Specifications

electrical insulation washer
-High resistivity
-Excellent electrical properties
-Poor heat conductivity

good quality/electrical insulation washer/ceramic washer

Feature:

1. High resistivity  
2. Moderate strength  
3. Excellent electrical properties
4. Poor heat conductivity (Thermal insulator).
5. Good resistance to thermal shock.  
6. Low coefficient of thermal expansion.
7. Good mechanical stability.  

Applications:

Heating element holders
Stand off Insulators
Interlocking Insulating Beads&Pins

Lamp bases and caps

Thermostat part

 

We can supply the products according to customer's drawings, samples and performance requirement.

Performance
Item	Index	Unit	Steatite ceramic	95 Al2O3	96 Al2O3
Physical Characteristics	Bulk density	g/cm3	2.7	3.6	3.6
	Water absorption	%	0	0	0
Mechanical Characteristics	Flexural strength	Mpa	145	320	340
	Hardness Vickers	Gpa	5.7	12.2	13.5
	Elastic modulus	Gpa	120	280	320
	Poisson’s ratio	-	0.21	0.22	0.23
Thermal Characteristics	Linear expansion coefficient	20-5000C       10-6/0C	7.9	7.1	7.2
	Thermal conductivity	w/(m.k)	2.5	16	24
	Specific Heat	*10-3J/(kg*K)	0.75	0.78	0.78
Electrical Characteristics	Dielectric constant(1MHZ)	-	6.2	9	9.4
	Dielectric loss angle	*10-4	18	15	5
	Dielectric strength	*106V/m	18	12	15